1.0 INTRODUCTION
This equipment is factory manufactured and tested water-cooled package for the
purpose of air-conditioning. It consists mainly of a direct expansion evaporator
coil(s) with thermal expansion valve, scroll compressor(s) and water-cooled
cleanable shell and tube condenser(s). Factory standard units also incorporate
important safety and operating controls which includes manual reset high and
low pressure switch, compressor motor protectors, sight glass and liquid line
filter drier for each compressor.
The water-cooled air-conditioner package consists of multiple compressors
(Except WCPS / 6WCPS 68B~190B) each with its own independent refrigerant
circuit, which guarantee standby partial capacity in case of failure of any one
compressor. It is equipped with cleanable shell and tubes condenser(s) which
enable economical and easier cleaning of condenser inner water tubes by brushes
instead of by chemical cleaning for co-axial tubes-in-tube condenser. The shell
and tubes condenser also has a lower waterside pressure drop compared with co-
axial tubes-in-tube condenser. Further more, any punctured inner tubes of the
shell and tubes condenser can be replaced instead of scrapping the whole
condenser in the case of the co-axial tubes-in-tube condenser.
Every Dunham-Bush water-cooled single package air-conditioner has been
carefully and intelligently designed, manufactured and tested. It is also subject to
stringent quality control and accurately tested as a final verification of reliability.
If it is correctly installed, operated and maintained, it will provide many years of
satisfactory and efficient performance.
These instructions are general in nature and are for
standard units only. Non-standard units may vary in some
respects from these instructions to suit particular
applications.
